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Matter In Our Surroundings
Give some points of differences between speed and velocity.
Difference between speed and velocity:
|
Speed |
Velocity |
|
1. Speed is the distance traversed by a body per unit time in any direction. |
1. Velocity is the distance traversed by a body in a given direction. |
|
2. It is a scalar quantity. |
2. It is a vector quantity. |
|
3. It is always positive or zero but never negative. |
3. It may be positive, negative or zero. |
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Convert the following temperatures to Kelvin scale
25°C
What is the physical state of water at
100 °C
For any substance, why does the temperature remain constant during the change of state ?
Suggest a method to liquify atmospheric gases.
Convert the following temperatures to Kelvin scale.
35°C
Give reason for the following observations.
Naphthalene balls disappear with time without leaving any solid.
Give reason for the following observations.
We can get the smell of perfume sitting several metres away.
What is the physical state of water at
a) 25°C
b)00C
c)1000C
What is the physical state of water at
0°C
What is the physical state of water at
100°C
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